JP2012231905A5

JP2012231905A5 -

Info

Publication number: JP2012231905A5
Application number: JP2011101866A
Authority: JP
Filing date: 2011-04-28
Publication date: 2014-03-13
Anticipated expiration: 2031-04-28

Claims

Radiation irradiating means for irradiating a subject from a plurality of directions while moving a radiation source for emitting radiation; and
Imaging means for detecting radiation transmitted through the subject with a radiation detector and capturing a radiation image;
Information acquisition means for acquiring vibration information indicating that the subject has moved;
The vibration information is acquired by the information acquisition means while the radiation source is moved from the first position to the second position and the subject is irradiated with radiation from a plurality of directions to capture the radiation image. the plurality after moving, the radiation source relative to the object while moving in the opposite direction from the second position to the first position the radiation source to interrupt the irradiation of the radiation to the second position Control means for controlling the radiation irradiating means and the imaging means so as to irradiate radiation from the direction of the image and recapture the radiographic image; and
A radiographic imaging apparatus comprising:

While the control means moves the radiation source from the first position to the second position, the information acquisition means captures the vibration information by irradiating the subject with radiation from a plurality of directions and taking the radiation image. 2. The apparatus according to claim 1, wherein the radiation irradiation unit and the imaging unit are controlled to end imaging of the radiation image after moving the radiation source to the second position when the radiation source is not acquired. Radiation imaging device.

Vibration detection means for detecting vibration transmitted to the radiation detector; and determination means for determining whether or not the subject has moved based on the vibration detected by the vibration detection means;
The radiographic imaging apparatus according to claim 1 , wherein the information acquisition unit acquires vibration information indicating that the subject has moved based on a determination result of the determination unit.

The radiographic image capturing apparatus according to claim 3 , wherein the determination unit determines that the subject has moved when an amplitude of vibration detected by the vibration detection unit is equal to or greater than a predetermined threshold.

It said determining means, when the intensity of the specific frequency component due to the movement of the subject detected vibration by the vibration detecting means is a predetermined threshold value or more, determines that the object has moved, in claim 3 The radiographic imaging apparatus described.

The threshold is based on the natural vibration detected by the vibration detection unit when shooting is performed without the subject and the addition vibration detected by the vibration detection unit when shooting is performed on the subject. The radiographic imaging device of Claim 4 or Claim 5 set.

The radiographic image capturing apparatus according to any one of claims 4 to 6 , wherein the threshold is set so that an image quality of the radiographic image falls within an allowable range.

It further comprises an informing means for informing by display or sound,
When the vibration information is acquired by the information acquisition unit, the control unit moves the radiation source from the second position to the first position in the reverse direction to notify that the imaging is performed again. The radiographic imaging apparatus of any one of Claim 1 to 7 which controls a means.

The radiographic imaging device according to any one of claims 1 to 8,
An image processing apparatus comprising reconstruction means for reconstructing a tomographic image based on a radiographic image acquired by the radiographic image capturing apparatus;
Radiographic imaging system equipped with.

When the control means retakes the radiographic image, the reconstruction means based on the radiographic image taken while moving the radiation source in the reverse direction from the second position to the first position. The radiographic imaging system according to claim 9, wherein the tomographic image is generated by reconstruction.

The radiographic imaging device according to claim 1;
Data acquisition means for acquiring image data of a radiographic image from the radiographic imaging device , vibration detection means for detecting vibration transmitted to the radiation detector as an image signal based on the image data acquired by the data acquisition means , Determination means for determining whether or not the subject has moved based on an image signal detected by the vibration detection means, and vibration information indicating that the subject has moved based on a determination result of the determination means An image processing apparatus comprising information notifying means for informing the apparatus, and reconstruction means for reconstructing the image data acquired by the data acquisition means to generate a tomographic image;
Radiographic imaging system equipped with.

Said determination means, the vibration when the amplitude of the detected image signal by the detecting means is a predetermined threshold value or more, the determining the object has moved, the radiation image capturing system according to claim 11.

The determination means determines that the when the intensity of the specific frequency component due to the movement of the subject detected image signal by the vibration detecting means is a predetermined threshold value or more, the object is moved, according to claim 11 The radiographic imaging system described in 1.

The threshold is based on the natural vibration detected by the vibration detection unit when shooting is performed without the subject and the addition vibration detected by the vibration detection unit when shooting is performed on the subject. The radiographic imaging system of Claim 12 or Claim 13 set.

The radiographic imaging system according to any one of claims 12 to 14 , wherein the threshold is set so that an image quality of the radiographic image falls within an allowable range.

The radiographic image capturing apparatus further includes a notifying means for notifying by display or sound,
When the vibration information is acquired by the information acquisition unit, the control unit of the radiographic image capturing apparatus moves the radiation source from the second position to the first position in the reverse direction and performs imaging again. The radiographic imaging system according to any one of claims 9 to 15 , wherein the notification unit is controlled to notify.